Covering for drawing-rolls of spinning machinery.



UNITED STATES PATENT OFFICE.

WALTER FRANCIS REID, OF ADDLESTONE, ENGLAND, ASSIGNOR TO THE VELVRILCOMPANY, LIMITED, OF LONDON, ENGLAND.

COVERING FOR DRAWING-ROLLS OF SPINNING MACHINERY.

SPECIFICATION forming part of Letters Patent No. 661,644, dated November13, 1900.

Application filed February 6. 1900. Serial No. 4,269. (No model.)

To all whom it may concern;

Be it known that I, WALTER FRANCIS REID, civil engineer, a subject ofthe Queen of Great Britain, residing at Fieldside, Addlestone, in thecounty of Surrey, England, have invented certain new and usefulCoverings Suitable for the Drawing-Rolls Used in Spinning, of which thefollowing is a specification.

The drawing-rolls used in spinning cotton and other fibers are usuallycovered with tubes of leather; but such tubes are expensive and have thedisadvantage of having a longitudinal seam. The leather also soonpolishes and is grooved by the fibers, causing alterations in thetension of the thread. India-rubber and like compounds have beensuggested, but are unsuitable, being acted upon by the grease in thecotton or other fiber.

According to this invention I employ a tube, preferably a seamless tubeof a mixture of nitrocellulose with nitroricinolein. A suitable mixtureconsists of one part, by weight, of nitrocellulose to two parts ofnitroricinolein. Nitrolinolein is of precisely the same nature asnitroricinolein, and I wish to be understood as considering this as anequivalent. The tubes may be made in a variety of Ways, such as byapplying a solution of the mixture (in any of the usual solvents ofnitrocellulose) to a revolving mandrel or by forcing the mixture underpressure through dies or by cementing together the edges of a sheet.

What I claim is A covering for the drawing-rolls used in spinningconsisting of a mixture of nitrocellulose with nitroricinolein.

, WALTER FRANCIS REID.

Witnesses:

VARASUN LARK, HENRY POPE.

